Printing telegraph apparatus



PRINTING TELEGRAPH APPARATUS Filed Sept. 20,.1941 4 Sheets-Sheet J.

INVE N TO I? CARL A. LEVIN ATTOI? EV I July 4, 1944. cf LEVIN I 2,352,643

PRINTING TELEGRAPH APPARATUS Filed Sept. 20, 1941 4 Sheets-Sheet 2 -e| 56 758 INVENTQR CARLA.LEVIN July 4, 1944.

F IG. 3

c. A. LEVIN 2,352,643

PRINTING TELEGRAPH APPARATUS Filed Sept. 20, 1941 4 Sheets-Sheet 5 INVENTOR CARL ALLEVIN A'TTQRNEY July 4, 1944. c, A LEVlN A 2,352,643

' PRINTING TELEGRAPH APPARATUS Filed Sept. 20, 1941 4 Sheets-Sheet 4 m2 INVENTOR CARL A.LEV|N Patented July 4, 1944 UNirEoi sr-ATEs PATENT PRINTING TELEGRAPH-APPARATUS Carl A. Levin, Chicago,- Ill., assignor to Teletype v e V a I Corporation, Chicago, 111., a corporation of Delaware Application September 20, 1941, Serial No. 41 1,65 9

9 Claims. (Cl. 197-53) The present invention pertains to printing telegraph apparatus and more particularly to page printing type wheelrecorders. I The primary object of the invention is to provide a printing telegraph apparatus wherein the speed to eliminate the necessity of moving .said

type wheel through its u'll path of'movement in each operativecycl ofthe apparatus. j

In accordance with the preferred embodiment of the invention there is provided a type wheel arresting mechanism'which includes a type wheel elevating cam for actuating a typewheel elevating bell crank lever, one arm of which is connected to the plunger of a dashpot and the other arm of which is connected to a camming rod for lifting a type wheel Supporting frame apredetermined amount with respect to the frame guide in each signal receiving cycle of the apparatus. The carriage supporting frame and the frame guide are movable as a unit upon the receipt of a shift or' figuresf code signal, or'an unshif t 'or 'fletters code signal therebyto select the row of type on the type wheel for printing in upper or'lower case characters, respectively. In the normal operation of a printing apparatus embodying-the'feature of the present invention, th e type wheel'will stay in its elevated position as long as code signals are'being received by the apparatus at a predetermined rate of speed due to'the efiect'of a dashpot on the type wheel lifting bail which resiststhetype wheel elevating bell crank in its movement to normal position. However, after the completion of message reception by the apparatus, or if there is a'slight pause in the transmission of signals and the receipt thereof by the present apparatus; the type wheel lifting bail spring willmove the cam'roller on the'type wheel lifting bailcrank into engagement with the low portion of the type wheel lifting bail cam, thereby to render the last' line'ofprinted message visible; In the preferred form of the invention the .camming rod is interposed between a pairof rollers,:one on the frame guideand the other on the type wheel supporting frame whereby in each cycle ofthe apparatus, if character transmission is at a much slower rate than normal, the cam ming rod due to its engagement with the rollers will effect a relative: displacement of the frame guide and type wheel supporting frame a predetermined amount regardless of the case position ofthetypewheel.

Some of the features disclosed but not claimed herein are claimed in the copending application of Carl A. Levin and Carl W. Swan, Serial No}. 411,658, filed September 20, 1941. A betterunder standing of the invention may be'had by refei ence to the following detailed description when considered in conjunction with the accompanying drawings wherein: I I

Fig. 1 is a front elevational view embodying the invention; 1 a V v Fig. 2 is a side elevational viewof the'apparatus shown in Fig. 1; 1 v 21-:

Fig. 3 is a fragmentary view in perspective of the apparatus shown in Figs." 1' and2, showing some of the details of the invention; Fig. 4' is a fragmentary plan sectional view ta-r ken along the line 4-4 of Fig. 1; i l "Fig. 5 is a fragmentary plan' sectionarv'ie'w taken along the line 5-5 of Fig. 2; 1f Fig. 6 is a fragmentary sectional plan vie'w;:'o1i an enlarged scale, take'nalong'the line 6 6 of Fig. '7 is a detail'sectional view taken along the line 1- 'I of Fig56; Fig. 8 is a fragmentary sectional view taken along the lin'e 8--8'o'f Figxfi; Fig. 9 is an enlarged fragmentary sectional view taken on the line 99 of Fig. 2; and

Fig. 10 is a fragmentary 'sectional'plan View taken on the line llll0 of Fig. 2. a Referring to thedrawing's wherein like refer ence characters designate the same" .parts throughout the several views,- particular refer ence is first had to Figs. 1 and 2 where, in front and side elevation, there are shown portions'of-a base or framework member 1|, parts of which have been broken away toconserve space. The details of the base or framework member I I have not been. completely shown since this portion of the apparatus is substantially 'th same as that shown in Patent No. 2,247,408.1ssu'ed July'l, 1941, to Albert H. Reiber. Similarly, the specific de; tails of the keyboard mechanismfno't shown) and the details of the distributor IZ whichds shown herein need not be described fully in this application since they are of exactly'the'same construction as in the Reiber patent. As in said patent, a motor I3 is suitably mounted upon the base orframework ll and supplies power .for

of apparatus a type wheel shaft 23 which has a type wheel 24 slidably keyed to it. The type Wheel andtype :1

wheel shaft are normally urgedto rotate by frictional clutch mechanisms not shown herein but shown in detail in said patent to pr'esent the typei'pallets in the type wheel selectively into association with a platen 25,-where they may be actuated by a print hammer 26. Th platen 25, its carriage designated generally by the nu-' meral 21, and the code discs for selectively stopping the if type wheel at selected positions are the .same as in the afore-mentioned patent.

The selector mechanism, as shown generally inthe various figures and as designated by the referenchumeral 30, is of the same construction as that shown in the Reiber applications mentionedhereinbefore and need not be descr-ibedin detailiherein. It suffices to state that the .selector'mechanism is mounted on themain shaft 3|" which "also supports the main or cam shaft drive gear H, the gear 11 being fixed to the-shaft 31, .and the selector mechanism being frictionally urged to rotate with the shaft '5 I. In

. the-present embodiment of the invention a single cam shaft is provided as -in the copending applicationlof Albert H; Reiber, ;Serial No. 77,796, filed May 4, 1936, and upon the receipt of a starting .impulse in't-he selector mechanism and'theinitiation of operation thereof, the clutch throwout lever.32 (Fig. 1) will be removed from engagement with, driven clutch -s1eeve33 and will permit va spring 34 to force the sleeve 33.into engagement with 'a driving sleeve 35 keyed to the shaft 3|. .Ihedriven clutch sleeve 33 is keyedfto and drives a main clutch shaft sleeve 35 on-which are mounted a selector transfer cam 31, a function bail cam 38, and a type wheel lifting bail :cam 39, together with a printing bail cam 45 (Fig. 1). The cams 3!, 3.8.39, and .oirthe sleeve 36 have associated with them mechanisms for effecting thefunctional operations underrthe' control of the cams.

The selection for operation of the various functiona1-mechanisms is under the direct control of the selector mechanism 30. In the present apparatus, the selection-of type pallets onthe type wheel 24 for cooperation with the print hammer Nzis-effecte'd'in exactly the-samev manneras in .the'said copending application of Albert H. Reiber referred tohereinbefore; that is, :as more clearly shown in Fig. 5, a series of swords 4| are set under -the-ioint control of :a. selector shaft and electromagnet (notshown herein but clearlyillustrated in-the said copending application of Albert H.1'Reiber) forv controlling the setting of transfer levers '42. :Associated with the transfer levers 42 are a'series :of code disc levers 43. one for'each the codedisc levers are simple bell crank levers,

hutin the present invention the code disc levers .eachh-ave an additional arm formed on them having a rounded tip which extends into a slot 41 in a code bar 48 associated with each of the code disc levers 43. The transfer levers 42 are pivoted on pivot studs 49 and receive the extending arm of the code disc levers 43 in their bifurcated ends, as shown most clearly in Fig. 5, whereas the levers 43 are pivoted on a pin or shaft 50, whereby the positioning of the transfer levers 42 will effect a setting of the code disc levers 43 thereby to set the code :discs 44 ?a'nd select type pallets inthe type wheel 24 fora'ct uation when a character is to be printed. Similarly, the setting of the code disc levers 43 will effect a setting of the code bars 48 which are spaced apart by spacer members 5| (Fig. 2) and are slidable on posts 52 and 53 extending upwardly from a plate "54. The -edges of the code bars 48 opposite to the slots '41 arenotched to select permutatively any oneof seven functions controlling bars 55 to SI, inclusive, by permitting a selected bar to fall into aligned notches in the code bars 48 under the urgingof its biasing spring, one of-which is provided for each of the function controlling bars 55 to 6|. The function controlling .bars .55 to-fil are pivoted on a pivot .rod 62 mounted on a stationary plate 63, bent over portions 64 and 65 of which support the pivot rod 62. The function controlling bars 55 to 6! control .thefunctions of line feed, blank, bell, carriage'return, figures or shift, letters or unshift, and ,unshift on space, respectively. The mechanism cooperating with the function controlling-bars will be described hereinafter together with their operation in the order just named. t

. Upon the receipt, in the selector mechanism 30, of a .line feed signal codecombination, the line feed functionrcontrollin'g .bar -55.,will bepermitted to drop into aligned notches, in the code bars 48 under the influence of. its biasing. spring which urges it to rock counterclockwise, as viewed in Fig. 1. Cooperating with .the function control! ling bar 55iis a line feed bar "which together with a bell bar .II and a break-lock bar 12 are pivoted on a post 13 (Fig. 3') fixed to a function hail 14. The bars 10, H, .and 1.2 are suitably spaced on the post 13 which also carries a spacing .bar 15 and a resetting bar :16. The function bail 14, which carries the post 13 on its two parallel arms, is pivoted on-a function bail pivot TI and carries acamroller 18 on its forwardly extending arm which cam roller is in engagement with the function bail cam "38. .The bars 10, 11, and 12, as most clearly shown in Figs. -3 and 4, are bifurcated to provide two rearwardly extending arms, one of which extends into the path of projections 19, 80, and BI (Fig. 9) on the-function controlling bars '55, 56, and 51, respectively. It should be noted that the arm of bar 10 is-in alignment with the projection 19, that the arm of bar H is in alignment with the projection 81, and that thearm of bar" isin alignment with projection 80. -The bars-1U, H, and 12 are normally urged to rock in a counterclockwise direction, as view in Fig. 3, under the influence of their biasing springs 82, '83, and 84, respectively, which areconnected to the forwardly extending portions of thebars 10, H, and 12, respectively, and are fixed to 'a post extending upwardly from the lowermost one of the two parallel arms of bail 7-4. The biasing springs '82; 83, and 84 attempt to draw the post 85 and the outer ends of the bars 10, H, and I2 together, thereby'serving two purposes; that-is, the springs attempt to rock the bars 10, H, and 12 counterclockwise (as viewed in Fig. 3) about the post 13, and since said bars are blocked by the pro- J'ections I9, 89, and 8| on the function controlling bars 55, 56, and 51, the springs 82, 83, and 84 will tend to hold the cam roller I8 in engagement with the cam surface of the cam 38. However, whenever one of the function controlling bars 55, .56, or 51 is permitted to rock counterclockwise as viewed in Fig. 1 about the pivot rod 62, its projection I9, 89 or 8| will rock the line feed bar I9, bell bar II, .or break-lock bar "I2 against the action of its associated spring 82, 83, or 84, thereby to move the rear end of. the selected bar I9, II, or I2 into position to actuate its associated function mechanism.

Positioned adjacent the rear of the machine are three function levers 81, 88, and 89 associated with the line feed, blank, and bell functions and having shoulders 99, 9I, and 92, respectively, formed thereon for engagement by the line feed bar I9, break-lock bar I2, or bell bar .II, respectively, whichever bar I9, II, or I2 has the arm of the line feed bar-I9 and move it against the action of its biasing spring 82, thereby to carry the rear end of the longer arm of the bar I9 into the path of the shoulder 99. As the function bail cam 38 rocks function bail I4 in a counterclockwise direction, the entire assembly of the bail I4 and the function bars I9, II, I2, 15, and I6 will be moved bodily toward the rear of the machine, and when the line feed bar I9 has been rocked clockwise with respect to the pars II and I2, its. rear end will engage the La'zlOllldI-EI 99 on line feed function lever. 81 to rock the function lever 81 in a counterclockwise direction about a post 93 which supports'it and the function levers 88 and 89. The function, lever 81 is articulated to a link 94 which is in turn connected to a line feed bail 95. The line feed bail 95 is pivoted on the framework at 96 and has an upper portion which is always in the path of a roller 91 mounted on the lower end of a pawl actuating lever 98 fixed to a shaft 99 which in turn has a pawl actuating arm I99 fixed to it. The pawl actuating arm I99 has a pawl I8I pivoted at its upper end normally urged into engagement with a line feed ratchet I92 connected to the platen 25 for effecting line feeding operations as described more in detail in the Reiber Patent No.'2,247,408.

If a. blank signal, that is, a signal of five spacpost 93 to close a pair of contacts not shown, but

associated with the function lever 89 and perform the break-lock function as described more in detail in the Patent No. 2,247,408 to Albert H.

Reiber.

If the function controlling bar 51 is selected by the code bars 48 presenting aligned notches for receiving the function controlling bar 51 due to the receipt by the selector mechanism of a signal shoulder I32.

representing the character S and comprising marking impulses in the first and third impulse periods and spacing impulses in the third, fourth "and fifth impulse periods while the-type wheel supporting frame is in upper case position, as

Will bedescribed more in detail hereinafter, the

bell bar 'II will be rocked in a clockwise direction (Figs. 3 and 10) against the action of its biasing spring 83, thereby to carry the rear end of the bell bar II into the path of the shoulder 9I on function lever 88, whereby when function bail cam 38 rocks function bail I4 in a counterclockwise direction (Figs. 3 and 4) the rear end of the bar 8 H will engage the shoulder 9| on function lever 88 and move lever 88 counterclockwise (Fig. 10) against the action of its biasing spring I93. When the low portion of function bail cam 38 moves into engagement with the roller I8, spring 83- will restore the bell bar II to its normal position and in so doing will permit the biasing spring I93 (Fig.

them at the point where they are engaged 'by'the carriage return function controlling bar 59. The

function controlling bar 58 will thus be allowed to fall into the aligned notches under the action 'of its biasing spring. and in so doing will be permitted to rock in a counterclockwise direction, as viewed in Fig. 1. The function controllingbar 59- for carriage return has a laterally extending portion H6 (Fig. 4) which terminates in an upwardly extending projection II'I, Figs. 4 and 6. The projection II'I enters into 'a slot H8 in a link I19 whichis in turn articulated to a. lever I29 pivotedat I I9 and having a rounded formation at its free end for engagement with a trip lever I2I. Trip lever IZI is pivoted on a pivot stud I22 and is normally urged to rock in a clockwise direction (Fig. 4) by a contractile spring I23 c onnected to the trip lever I2I and a latching lever I24. The trip lever I2I is provided with a cam surface I25 bearing against a projection I29 on a pawl supporting member IZ'I which carries adjustably fixed thereto a pawl I28 and which is normally urged to rotate in a counterclockwise direction by a biasing spring I29. When the projection v I I1 on the carriage return controlling bar 58 is moved to the right as viewed in Fig. 4,

.. the link H9 will impart movement in a clockwise direction to the lever I29, thereby torock the tripjlever in a counterclockwise directionand "move the camming surface I25 thereof to the left,

Fig. 4, to rock latching pawl I28 out of engagement with the spacing ratchet I39. The spacing ratchet I30 is fixed on a carriage feeding shaft I3I which drives the carriage in exactly the same manner as the carriage is driven in the structures of the copending. applications,

The rear end of lever I2I has a' shoulder I32 formed thereon which will be engaged With the latching lever I24 when trip lever I2I is rocked in acounterclockwise direction, Fig, 4, spring I23 opposing the counterclockwise movement of lever 'I2I and causing lever I24 to rock clockwise sufficiently to engage its left end, Fig. 4, withthe The retaining pawl I28 will be locked out of engagement with the ratchet I39 eachtime the carriage return function selecting 'bar 58 is selected by the code bars 48 due to the engagement of the left end, Fig. 4, of the latching lever I24 with the shoulder I32 on lever-I2 I, until lever I24 is rocked in a counterclockwise direction against the action of its biasing spring I23, as Wil be described more in detail hereinafter.

The right side of the lever I2I as viewed in Fig. 4, also constitutes a cam surface for en.-

gaging a pin-I39 fixed in the spacing bar to hold a pawl portion I33 of the spacing bar 15 out of engagement with the teeth of the ratchet I whenever the carriage return function hasbeen performed. ,It should be noted at this time that the bar 15 is normally, urged into .a position where the pawl portion I33 thereof will'engage the teeth 'of the ratchet I30 by a Spring I34 so that in normal operation of the apparatus the spacing function will take place for each cycle of the apparatus. It should also be noted that the spacing bar 15 is not positively driven by the function bail 14 but is permissively driven due to the construction "of the bar 15 as most clearly shown in Fig. 4,

wherein the bar 15 has a rectangular opening I35 formed therein in which a spring I36 is positioned,

one end of the spring bearingagainst the end of the opening I35 and the other end of the spring bearing against a collar I31 on the post 13fixed to the function bail 14. The spacing bar 15 is provided with an arm designated 151A which extends across in front of the bars 55 to 6I so that if any functional operation is selected for operation in a definite predetermined cycle of the apparatus, the spacing bar 15 will be rocked clockwise about the post 13 to prevent the engagement of the pawl portion I33 thereof with the ratchet 1 In connection with the carriage return and spacing operations which have just been described hereinbefore, it should be noted that there is provided on the post 13 the resetting bar 16 (Figs. 3

and 4) which is invariably operated through the same path each time the function bail 14 is rocked by its associated cam 38. Tins resetting. bar serves to reset the trip latch or latching lever I24 in the cycle of the apparatus following a cycle in which a carriage return function was effected.

The bar 16 has an upwardly extending projection I38 formed on it as most clearly shown in Figs. 3

'and 4 for cooperation with a resetting. mechanism of exactly the same construction as that shown in the vafore--mentioned Reiber Patent No.

The figures or shift controlling function bar 59 will be selected for operation by the code bars 48 upon receipt in the selector mechanism of a figures shift signal, and when selected in this manner, the figures or shift function controlling bar 59 will rock in a clockwise direction, Fig. 1. Pivoted on the rod 62, as most clearly shown in Fig. '1, is a bell crank lever I50 which is biased to rotate in a clockwise direction by its biasing spring I52, and which carries a roller I5I on its substantially vertically extending arm. The roller I5I is held in the path of the function controlling bar 59 and when the function controlling bar 58 is rocked in a counterclockwise. direction by its-biasing spring due to the alignment most clearly in Figs. 2 and 3.

mocking beyond .a definite position in a counterclockwise direction .as viewed inFig. 2. The case shift lever I is pivotedat I56 on a stationary portion of the frame of the apparatus and is urged to rock in a counterclockwise direction by a spring I51 to carry a projection I58 formed on one of the arms of the lever I 55 into engagement with an extension of the functionbail 14 as shown The end of the spring I51 opposite to that secured to the case 'shift' lever I55 is secured to a pin I59 extending tion bail 14, thus tending to hold the extension I58 and the projection I6I in engagement with opposite sides of the extension on the bail 14,

to cause them to follow the movement of the bail 14. However, if the shoulder I53 on the bell crank I50 (Fig. 7) is in the path of the extension I54 on the lever I55, then the lever I55 will not necessarily follow the function bail 14 but the spring I51 will be extended. When, as described hereinbefore, the'shoulder I53 is moved out of the path of the extension I54 due to the receipt by the apparatus of a shift function signal, the lever I55 will be permitted to rock farther in a counterclockwise direction than it would if the shoulder I53 were in the path of the extension I54 on the lever I55. When the shift function signal is received, the type Wheel24 will be lifted to its maximum height as will be described more in detail hereinafter to print upper case or figures characters. A camming projection I62 on the lever I55 is adapted to engage an arm I63 on a case shifting frame I64 which is slidable to either of two positions on a guide pin I05. A pair of shouldered members I65 and Ialalso aid in guiding the carriage shifting frame I54, and these members I66 and I61 are fixed in a type wheel supporting frame I58. The type .wheel supporting frame I68 is slidable on a pair of posts !69 and I10.

The case shifting frame I04, as most clearly shown in Figs. 1, 2, and 3, is provided with a horizontally extending blocking portion I12 which serves to block the bell function bar 5! from falling into the aligned notches on the code bars 48 upon the receipt of a signal in the selector mechanisin representing the letter S in the lower case and bell in the upper case. This blocking portion I12, when the case shifting frame I64 has been shifted to its upper position or the figures case shift position, will bev out of the path of the bell function controlling bar 51 and the.bell function controlling bar 51 will be permitted to drop into the aligned notches in the code bars 43 upon the receipt of a signal representing bell or S. It should be noted at this time that the blocking portion I12 of the case shifting frame I54 extends over function controlling bar 56 which controls the blank function, but that the function controlling bar 55 is shorter than the other function controlling bars and therefore will not .be blocked from movement into aligned notches intlie code bars 48 by the blocking portion I12 in either of its upper or lower positions.

Uponthe receipt-in the apparatus of a signal representing unshift or letters case functions,

the code bars-48 will be shifted to a position to present aligned notches to the unshift function controlling bar60 thereby to permit its biasing spring to rock it counterclockwise as viewed in Fig.1. Similarlmuponthe receipt of. a word-space signal, the funshiftionspace function controllingibar 6| will be-permitted to rock in a counterclockwise direction, as viewed in Fig. 1, into alignedznotcheson .the code bars 48. Since both of the function controlling bars 60 and BI control the same function, that is, the unshift. function,

their operation will bedescribed at the same time.

Pivot-ally supported on the rod 62 is a bell crank I99 (Fig. .8) which is positioned between the functioncontrolling bars 50 and BI and is urged to rbtateina clockwise direction about the pivot rod Why a biasing spring I9i. The horizontally extending arm of the bell crank lever I80 has the springISI connected to it, and the vertically extending arm,as:-viewed in Figs. 6 and 8, carries a'pair of abutments I82and' I93, the abutment I82 extending over into the path of movement of the function controlling bar 99, and the abutment I83 extending over into the'path-of movement ofthe function controlling bar whereby upon the lselection-of either the function controlling bar 50 or the function controlling bar 5| and its consequent rocking in a counterclockwise direction as viewed in Fig. 1, the bell crank I80 will be rocked in a counterclockwise direction against the action of its biasing spring I8I. Thus, the normal position of the bell crank lever I89 is as shown in Fig. 8, to which position the bell crank lever I80 had been moved by the receipt in the apparatus of a spacing or unshift signal, and

with the arm I93 on the case shifting frame I64 and the release of the horizontally extending arm I54 of lever I55 by the bell crank lever I50., Thus, upon the receipt of a shift or figures codesignal in the apparatus, and the consequent release of'the arm I54 from the shoulder I53, the case shifting frame I64 will be lifted to its uppermost position by the type wheel elevating lever I55 and will be latched in its uppermost position by the bell crank lever I80 whose shoulder I85 will move under the portion I85 of the case shiftingframe I64 until an unshift or .let-.

ters, or a word-space signal is received'in the selector mechanism 30. When an unshift signal is received in the selector mechanism 30, bell crank lever I80 will be rocked in a counterclockwise direction as described hereinbefore, and will release the portion I85 of the case shifting frame I94 from the shoulder I86 and permit portion I85 to drop down onto the shoulder I84. As the case shifting frame I,64 dropsjto its lower position, the bell crank I 50 will be permitted to block the movement of the lever I55 and prevent it from lifting the case shifting frame to its uppermost position.

As described hereinbefore, the case shifting frame I64 has two positions, andthe type wheel supporting frame I 68 is movable with respect tdth caseshifting frame. Fixedto the case shifting frame I64 adjacent its lower end is a roller I81 which is freely rotatable on a post I88 which also supports a guide member I89. The

shoulderedmember I66 is fixed to the type wheel supporting frame I68 and carries a roller I90.

engagement of the'projection I52 of lever I 40 guide member I89 and the case shifting frame I64 and is engaged between the rollers I81 and I90. Camming member I! is loosely articulated on the free end of a type wheel elevating cam lever I92 pivotally supported by the function bail pivot post I1 and biased to rock in a clockwise direction' by biasing spring I93 (Fig. 3). Cam lever I92.carries a cam roller I94 intermediate the ends ofits-forwardly extending arm I95. The arm I95 of :leve'r I92 under the influence of spring I93 normallytends to hold the cam roller I94 in engagement with type wheellifting bail cam 39, and

arm I95 is'slotted as shown at I96 to' engage orv receive a. plunger actuating disc I97 fixed to apiston rod or a plunger rod I98 (Figs. 3 and .4);

The plunger'rod I98 has fixed to its left. endpas viewed in: Fig. 4, a piston member I99 which is freely movable'to the rightin a dashpot cylinder 200: The dashpot cylinder 200 is provided with' an "adjustable escape valve designated. 20I-,--

wherebythe-rate of travel of the piston I99 and consequentlythe rate of travel of the type wheel elevating cam lever under'the urging'of spring.

I93 may be regulated. The type wheel elevating cam lever I92is' operated by'its cam once for each cycle of the apparatus to raise the type wheel to either oneof its printing positions depending upon the casein which the case shifting frame I64 happens to be positioned. The valve 201", however, may be adjusted to so regulate thespeed of movement of the-piston 200 that the cammingj member I9I will not be completely retractedetoit's normal position by spring I93 to permit the type wheel to drop down and render visible the last character printed if a'rnessage is being received'at normal speed. If the valve 20I is properly regulated to retard the return off the pistonl99, thereceipt of signals at an average rate of speed will result in the cam 39 imparting a slight degree of oscillation to its associated cam" lever I92 but the cam member I9! will not return to its normal'positio'n as shown in Figs. 2 and '3, but will remain in aposition where the wider portion thereof is between the rollers I9Ian'd' I90. f Type wheel supporting frame I88 will stayinits theftype' wheel 24 will be permitted to move down out of the position in alignment with the'platen 25 due to the retraction of the cam member I9I to its normal position and'the consequent movement of the narrow end portion of thecamming' member I9I" into a'positicn between the rollers I87 and I90. I Thefprint hammer 26 provided herein, is of exactlyjthe same construction'as that provided inReiberPatentiNo. 2,247,408,'and is driven by a printing bail a sufiicient distance so that its own inertia will cause it to overtravel and effect" I printing as described in detail in said copending n carnmingmember I 9I is'guided between that" application. However, the printing bail 205 is driven by aprinting cam lever 206 carrying a cam roller, 201 in engagement with printing bail cam 40. In the present apparatus, the printing bail cam is mounted upon the main clutch shaft sleeve 3 6 andis so cut that printing takes place;

just ..tcz.- l tendthe cycle 1 h i sleeve and substantially simultaneously. with the. returnito normal ofthe function bail 14; andthe. type wheel elevating cam lever 192..

In the operation. of. the apparatus, the soles-- tion of characters for printing is. thus performed: under control of the selector mechanism. 30. in the same manner as in the copending application of Albert H. Reiber identified hereinbefore. However, the selection of functionsfor operation in the herein described structure is performed simultaneously with the setting of the. code discs.

which control the rotational position of the type wheel 24. by setting the function controlling. bars. 55 to 6| singly and performing the selected func.-. tion in the same cycle that the selection. is made.

After any functionxor character: printing, operation .has been performed it is necessary tore.-

, store the apparatus to normal so that a succeed-ring operation maybe performed. Since, in the. present apparatus, printing and functional op.-; erations. take place in the same cycle with their selection, the restoration of the apparatus to normal occurs inv the first part of each cycle under control of the selector transfer cam 31.

Associated with cam 31 (Fig. 4) is a cam roller. 2-H) rotatably mounted on one arm of a transfer. bail lever 2H to which a spring biased transfer bail H2 is adjustably secured. Lever 2 has articulated to it a cam lever 2l3 provided with cam surfaces 2M and H5. The cam surface 2l5 engages a roller ZIB and when the transfer bail; 2J2 unlocks the transfer levers. as described in said copending application of Albert H. Reiber, cam lever, 213 will be drawn toward the frontof the machine and will be rocked counterclockwise due to its engagement with the roller 2l6. As cam lever 2|3 rocks counterclockwise, cam surface 2|5 thereon will move along a roller 2J9 fixed to a restoring lever 2|! and will rock restoring lever 2 I l counterclockwise (Fig. 4) about pivot pin-2l8. The left edge (Fig. 4) of lever 2" extends across function controlling bars 55. to 6!, inclusive, and will restore them to normal at the beginning of each cycle thereby to restore code bars, 48 and preparethem for receiving the next signal. v

While a specific embodiment of the invention. has been described hereinbefore, it will be understood that various modifications and adaptations thereon may be made without departing from the wheel supporting frame shiftable betweenaprinte ing position and a normal position, a camming member movable toshift said type wheel supporting frame to printing positiomsaid camming member being provided with a dwell portion associated with said supporting frame when the frame is in printing position, means for moving said camming member to its operated position to move the supporting frame to printing position, means, for urging said camming member to said normal, position, andme'ans for retarding the movement of said camming member to said normal position;

2, In a type wheel elevating mechanism for a printing telegraph apparatus, a case shift frame, a type wheel elevating frame movable with re-- spect to said case shift frame, means for imparting a predetermined amount of relative reciprocatory movement between the case shift frame and the type wheel supporting frame, andn'reans for retarding the operation of saidla'st mentioned means in its movement in one direction. t

3. InIa. printing apparatus, a type wheel, means for. shifting said type wheel. from a. nonprinting position toaprinting positionback .to a nonprinting; position, and means associated withsaid shifting means effective. under predetermined-operattive under predetermined operating. conditions for preventing the shifting of said type wheel back. to said nonprinting position to thereby enable said type wheel to remain insaid printing position.

5. In a printing telegraph apparatus, a type wheel, a type wheel supporting frame shiftable to carry said type wheel from a nonprinting. position to a printing position and back to a nonprinting position, means for actuating said type wheel supporting frame comprising a cyclically operable cam sleeve, a cam on said cam sleeve, a. cam arm associated with said cam to be driven thereby, a camming member articulated to said cam arm for actuating said type wheel supporting frame, and power storage means for facilitating the restoration of said frame to nonprinting'position, and means controlling said camming member for delaying the restoration of said type wheel frame to said nonprinting position by said Power storage means.

actuated bell crank lever, a camming member articulated to said cam actuated lever, a type wheel supporting frame shiftable to carry the type wheel from a nonprinting position to a.-

printing position and back to a nonprinting position, power storage means for facilitating the restoration of said frame to nonprinting position, and a cam roller mounted on the type wheel supporting frame for cooperation with said camming member to reciprocate said frame.

J 7. A type wheel reciprocating mechanism for a printing telegraph apparatus comprising a typewheel, a type'wheel' supportingframe shiftable tov carry said type wheel from a nonprinting position to a printing position and back to a. non.-

I printing position, ,a lever, a cam for actuating said lever, a cammingimember articulated t0.said cam actuated lever, a cam follower mounted on the-type wheel supporting frame for cooperation with said camming member, power storage, means. cooperating with said camming member to recip,- rocatesaid'frame between printing and nonprintiing positions; and means for controllin said lever for delaying the movement of said type wheel frame t'o-said nonprinting position;

8 11i a printing telegraph amoaratu's,v a verti callyreciprocable type, Wheel, a case shift frame sett'able in either of'two positions to, determine te ase position of saidjtype wheel, "means "to shift the type wheel from a position out of alignmerit-with the printing position to-a' positionin alignment with the printing position in each cycle of theapparatus including a camming membef for impartinga predete'rmined amount of relative movement between the case shift frame and the type wheel supper-ting frame in 3 eachcycle of theapparatus, and means renaming the- .75returnmovement of said typewheel shifting ratus, means for urging the type wheel to nonprinting position, and means for retarding said means urging the type wheel to nonprinting position to thereby normally hold said type wheel in its printing position.

CARL A. LEVIN. 

